| 968 / | HD | HOROLOGY |
| 553 | DD | CLOCKS DRIVEN BY SYNCHRONOUS MOTORS [G04C 15/00] {4} |
| 554 | | .~ Without power reserve [G04C 15/00B] {4} |
| 555 | DD | .~.~> Provided with hand-actuated starting device [G04C 15/00B2] |
| 556 | DD | .~.~> Provided with automatic starting device [G04C 15/00B3] |
| 557 | DD | .~.~> Provided with means for indicating disturbance [G04C 15/00B4] |
| 558 | DD | .~.~> Provided with means for checking sense of rotation [G04C 15/00B5] |